Double set of Roadmarkings boilers. They have done little work and will need new thermostats. The boilers are run by a Lombardini engine and run well. The truck has just had a service. The boilers are gas fired. The truck runs great Aslong as its fuel is kept above 1/4 of a tank. Where the truck has been sat for a while the truck has a slight fuel problem. If it goes below 1/4 of a tank it will cut out. Please call me on 07896154299.Carl